hmac_sha256.h

/*
* The MySensors Arduino library handles the wireless radio link and protocol
* between your home built sensors/actuators and HA controller of choice.
* The sensors forms a self healing radio network with optional repeaters. Each
* repeater and gateway builds a routing tables in EEPROM which keeps track of the
* network topology allowing messages to be routed to nodes.
*
* Created by Henrik Ekblad <[email protected]>
* Copyright (C) 2013-2019 Sensnology AB
* Full contributor list: https://github.com/mysensors/MySensors/graphs/contributors
*
* Documentation: http://www.mysensors.org
* Support Forum: http://forum.mysensors.org
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* ======================================================================
*
* HMAC SHA256 implementation for AVR:
*
* This file is part of the AVR-Crypto-Lib.
* Copyright (C) 2006-2015 Daniel Otte ([email protected])
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>.
*
* Author:   Daniel Otte
*
* License: GPLv3 or later
*
* ======================================================================
*/
 
 
#ifndef _HMAC_SHA256_
#define _HMAC_SHA256_
 
#define IPAD 0x36 
#define OPAD 0x5C 
 
#define HMAC_SHA256_BITS        SHA256_HASH_BITS 
#define HMAC_SHA256_BYTES       SHA256_HASH_BYTES 
#define HMAC_SHA256_BLOCK_BITS  SHA256_BLOCK_BITS 
#define HMAC_SHA256_BLOCK_BYTES SHA256_BLOCK_BYTES 
 
 
typedef struct {
    sha256_ctx_t a; 
    sha256_ctx_t b; 
} hmac_sha256_ctx_t;
 
void hmac_sha256(void *dest, const void *key, uint16_t keylength_b, const void *msg,
                 uint32_t msglength_b);
 
#endif